"Sonar buoys are projected, depth charges are ready for an attack." The captain gave the command, and he operated the plane and began to circle.

"Don't attack, dive quickly, dive quickly, there are patrol planes." The co-captain suddenly saw a huge black shadow in the air, and he immediately shouted, his tone filled with infinite horror.

"Rush down, dive quickly, all the water tanks are filled with water at once." The captain shouted, and the Boston sailors began to frantically flip the valves to get the water flowing into the tank as quickly as possible, but it was too late, and the Chinese Navy's anti-submarine patrol aircraft had already dropped the first sonar buoy.

"Drop depth charges." At the sonar man's command, the bombardier dropped the first bomb on the surface. Due to the noisy nature of the Boston submarine, the sonar easily located its depth, and after locking on to the target, the depth charges began to exert their power.

Depth charges were so powerful that it took only three bombs to blow a large breach in the Bostonian submarine. The Boston submarine, with a displacement of only a few hundred tons, simply could not withstand such damage, and after a large amount of seawater poured into the boat, it was no longer able to surface. With dozens of crew members, the submarine slowly sank to the bottom of the sea, and only some debris and oil stains gradually flowed out and rose to the surface of the sea along the breach.

"Oil stains were found on the sea." The radar soldier saw the situation on the sea surface on the screen.

"The sonar has no reflected signal." Sonar soldiers also reported.

"Detonate the sonar buoy, record the coordinates, and write our record in the logbook." The captain gave a casual order, and then he flew the plane around in a circle, flying off into the distance.

As the plane drifted away, the sonar buoy floating on the surface of the sea suddenly exploded, and the debris slowly sank to the bottom of the sea. This is the sonar soldier on board sent a radio signal with a self-destruct command to prevent the sonar buoy from being captured by the Bostonians and obtain important information about the Chinese imperial sonar system.

In the month following the start of the war, under the joint strangulation of destroyers and anti-submarine aircraft of the Chinese Navy, more than half of the submarines of the Boston Empire, which was equipped with as many as 300 mackerel-class submarines, were destroyed, while the number of merchant ships destroyed by the Chinese Empire was pitiful. At the end of the day, these Boston submariners had begun to disobey orders and refused to go to sea, and the Boston Empire authorities had to temporarily stop attacking NATO's sea transportation lines.

Compared to the submarine forces of the Axis powers, the war situation in the Chinese Empire was quite good. The Chinese Empire has always been the most advanced country in submarines, but due to the short preparation time for war, the construction plan of the new Seawolf 3 submarine has not yet been completed, and even if the submarine shipyard works overtime to manufacture it, only more than 120 Seawolf 3 submarines have entered service.

In addition to the aircraft carrier formations to escort anti-submarine ships, only 72 of them can attack, and this is when all the coastal defense tasks are handed over to the Seawolf 2 submarines that have not yet been decommissioned. After more than a month of sailing, the flexibly arranged submarines sailed from the naval base on Yizhou Island to the port of Rio de Rio in the Empire of San Martin, where they were resupplied and deployed to the Storm Ocean.

"Heading 090, speed twelve knots, maintain a depth of five meters." Liu Yujie carefully issued the order and directed his submarine towards the busiest route in the stormy ocean.

Liu Yujie is the son of Fang Xiaoyu's old subordinate Liu Junxi, his father is also the famous chief of the Chinese Imperial Police, and his uncle Liu Junguo is a retired commander-in-chief of the navy, but he has never revealed his identity to others.

Liu Yujie has been very fond of the Navy since he was a child, and after graduating from high school, he devoted himself to the Naval Officer School and directly chose the submarine major. In this profession destined to be linked to loneliness, he excelled in exams every year, and finally graduated as the first in his grade and was assigned to a Seawolf 2 submarine as the first officer.

During another training in the open sea, the submarine was unexpectedly severely damaged, and the captain was killed instantly, in this case, he insisted on directing the crew to drive the submarine back. Due to the proper handling of this emergency, Liu Yujie also registered with his superiors, and after the first batch of Seawolf 3 submarines entered service, Liu Yujie was selected as he wished to become the captain of this new submarine.

Liu Yujie is very satisfied with this excellent submarine under his command, the only fly in the ointment is that he served on the submarine for three years, but he was not able to go to the battlefield, but now he finally ushered in the opportunity.

Liu Junxi, who was originally worried about his son, wanted his eldest brother to exert his influence and leave Liu Yujie's submarine in the aircraft carrier formation, which would be safer. But Liu Yujie, who learned of his father's small actions, had a big fight with his father, and then he also found the current naval commander Zhang Haiyang and strongly asked to fight on the front line.

Zhang Haiyang is very protective of this excellent subordinate, he supports Liu Yujie's decision very much, and personally convinces Director Liu Junxi, and Liu Yujie also set up the first batch of submarine commanders to enter the storm ocean as he wished.

"Boss, call 1091 to say that they have their sights on a big fish." The communications corps reported the situation. The sailors on this submarine were very convinced by this knowledgeable and excellent captain, and they all called this young captain the boss regardless of their age, as a sign of their affection and admiration for him.

Liu Yujie took the telegram and looked at it, and a smile curled up at the corner of his mouth: "Great, it's not far from us, turn to 050 on the course, drive at full speed, let's catch up." ”

"Yes, heading 050, full speed." The two helmsmen agreed in unison and began to steer the submarine. As a new generation of submarines powered by AIP, the No. 1085 submarine commanded by Liu Yujie can be described as quite strong, not only the underwater speed is extremely fast, but also does not need to go to the water to recharge the submarine, and even the oxygen that soldiers need to breathe can also be provided by seawater electrolysis, which is absolutely safe in the face of the anti-submarine strength of the navies of various countries today.

I heard that the empire is also preparing to build a new submarine with a larger displacement, I really don't know when it can be used, Liu Yujie remembered the performance of the new submarine he heard from his uncle, and he sighed for a while, but I heard that the new submarine is ready to start construction, and the first batch of new submarines will be reequipped by the most outstanding troops, which is a great opportunity, as long as he can sink enough tonnage, this refitting will not be able to run.

Liu Yujie was thinking about how to get enough combat merits as soon as possible so that he could be selected for the new submarine refitting team, but the sonar soldier reported in a low voice at this time: "Boss, the target has been discovered, there are a large number of ships in front of us, at least eighty, and they are all big guys. ”

Hearing the sonar soldier's report, Liu Yujie walked over quickly. The sonar used by the Chinese Empire is no longer the old-fashioned model that can only listen to sound, and the new sonar will filter the clutter through the computer after the echo is transmitted, and then display it on the display screen in the form of electrical signals, which not only reduces the difficulty of using sonar soldiers, but also makes it more intuitive.

Liu Yujie lay on the side of the sonar, looked carefully at the large shadow on the screen, and felt excited in his heart, this is a great feat. "How far is it?" Liu Yujie asked.

The sonar soldier replied: "We are still about sixty kilometers away, and the other side is advancing at a speed of eight knots. ”

Liu Yujie nodded: "Enough, the submarine floats to the periscope depth and releases the communication buoy." Liu Yujie gave the order, and the submarine, which was originally diving 50 meters underwater, immediately floated to a depth of 5 meters, and at the same time released the communication buoy out of the air.

Liu Yujie's request for the release of the communication buoy was not intended to communicate with other submarines, because the Chinese Empire now had advanced underwater acoustic communication technology, which allowed them to communicate with each other very easily at a distance even in the water, without fear of being detected by Axis radio surveillance.

This kind of communication buoy is specially used to allow the submarine to contact the satellite, because the satellite connection can not be affected by the water, the previous submarine must surface in order to contact the satellite, but the target is too large, it is quite dangerous for the submarine, once it is discovered by the enemy aircraft, the submarine has the danger of being besieged, and now it is much easier to use the communication buoy. The target of the communication buoy is very small, it is not easy to be detected, and it can also be self-sunk after use, which can ensure the safety of the submarine and is easy to use.

After connecting the spy satellite, Liu Yujie downloaded the photos taken by the nearby satellite from the data link, selected them on the computer, and a series of photos of the fleet were found.

This is where the Chinese Empire, which has the power to control the sky, has the greatest advantage, they can find all targets from high in the sky, and any movement of the Axis forces cannot hide from the eyes of the satellites, and the other side knows nothing.

After carefully studying for a while, Liu Yujie said: "The other party is a large transport fleet, there are only four escort ships, it should be the Corinth-class destroyers of the Boston Empire, this kind of destroyer only has old-fashioned sonar and depth charges, and it is not a threat to us." ”

Liu Yujie's words made the sailors excited, after more than a month of diving before they came to the battlefield, they didn't expect to find their prey so quickly, how could this not make them excited.

Liu Yujie looked at his watch and said, "It's less than an hour before it gets dark, let's catch up, otherwise we won't be able to reap the benefits." The sailors applauded, everyone strictly guarded their posts, and everyone was excited about the battle.

Night had fallen, and the sea was silent, and the only sound of the waves crashing against the hull could be heard in the breeze. The convoy was still moving slowly, but most of the sailors had fallen asleep, and those who remained on duty were also drowsy in the soft night.